Grand Street Bridge, Double-leaf deck-girder bascule bridge in Bridgeport, United States.

The Grand Street Bridge is a bascule bridge in Bridgeport, Connecticut, that crosses the Pequonnock River with movable leaf sections. The deck structure can open to allow river traffic to pass, making it an operational piece of infrastructure rather than a static crossing.

The structure was commissioned in 1916 as Bridgeport expanded rapidly during the industrial era. It opened to traffic in 1919 after the completion of its distinctive mechanical systems.

The structure served the industrial growth of Bridgeport by providing a vital crossing for workers and goods moving between neighborhoods. It remains a landmark that shaped how the city developed along the waterfront.

The bridge is accessible from both ends of Grand Street, and the best views come from standing on the street level itself. The area sees regular foot and vehicle traffic throughout the day, making it easy to visit at any time.

The movable leaf sections were an advanced feature when completed, but they operate rarely today. This change reflects how river traffic needs shifted across the decades since the bridge opened.